Improvement in methods of marking and ornamenting glazed ware



UNITED STATES ATENT OF IE.

IMPROVEMENTINMETHODS 'OF MARKING AND ORNAMENTINGi GLAZED WARE.

Specification forming part of Letters Patent N0. 207,543, dated August 27, 1878; application filed June 1, 187B.

To all whom it may concern:-

Be it known that 1-, WILLIAM F. NIEDBING- "innus, of St. Louis, Missouri, have invented a new and useful Improvement in the Mode of Marking and Ornamentin g Glazed Ware, of which thefollowing is a full, clear, and exact description.

The present improvement has relation to forming a mark in the enamel or glaze of enameled ware, andis intended more particularly for enameled sheet-iron ware.

Heretofore in marking glazed ware the practice has been to apply the mark directly to the base of the ware-that is, in marking potteryware the mark is applied to what is termed the biscuit, and while the latter is in a dry state, and afterward the enamel is fused upon the base.

Myimproved modeis asfollows': The mark is first printed, with suitable material for fusin g, such as oxide of cobalt, upon a piece of papersay, thin tissue paper. This paper is then gently laid (the printed side down) upon the unfused glaze of the ware just after the latter is taken from the glaze bath and while the unfused glaze is yet moist. The ware, with the paper adherin g thereto, then goes to the dryin g-room. As the glaze dries the paper drops off, leaving the print absorbed in the glaze.

The ware is then-baked in the ordinary way,

whereupon the mark will appear in the enamel and fused'therein.

In preparing the material for the mark a v flux is preferably used. The mark can be printed without it; but the flux makes it appear brighter.

Themark is suitably arranged upon the paper to appear in proper order when transferred to the glaze.

'It will be seen that the second coating of enamel heretofore required is. no longer needed, the mark being formed in the first coating. If, however, a second enamel is applied to the ware, the mark can be formed in it as well as,

in the first enamel. I This improvement can be applied to glazed ware generally, to enameled sheet-iromware,

and to most of the various kinds of potteryto all, indeed,in which the outer coat of enamel is applied in the form of a paste. Any of the metallic oxides maybe used.on the print, and

thereby different colors produced at will, which enables this process to be used in ornamentin'g such ware as well as simply printing a mark thereupon.

WM. F. lfIlEDRINGHAUS' Witnesses i thus. I). Moonv,

PAUL BAKEWELL. 

